Study with the several resources on Docsity
Earn points by helping other students or get them with a premium plan
Prepare for your exams
Study with the several resources on Docsity
Earn points to download
Earn points by helping other students or get them with a premium plan
Community
Ask the community for help and clear up your study doubts
Discover the best universities in your country according to Docsity users
Free resources
Download our free guides on studying techniques, anxiety management strategies, and thesis advice from Docsity tutors
ARMRIT Practice Exam Part 3 MRI Safety With 100% Correct And Verified Answers 2024
Typology: Exams
1 / 3
The factor which determines the calculated SAR average is: - Correct Answer-The Patient weight in kilograms The maximum exposure to the head and trunk from the main magnetic field (Bo) is: - Correct Answer-3T The force that can cause a ferromagnetic object such as an oxygen tank to become a projectile in the fringe field is: - Correct Answer-Translational attraction Maximum exposure to Radio-frequency (RF) averaged over the head is: - Correct Answer-No more than 3.2 w/kg Currently, pregnant patients and personnel are excluded from exposure to MRI for the: - Correct Answer-1st trimester Magnetically sensitive objects such as credit cards, magnetic tapes, and discs, and EKG equipment should be kept beyond the ______ gauss line. - Correct Answer-5 gauss line SAR stands for: - Correct Answer-Specific Absorption Rate Hazards associated with large ferromagnetic objects, such as oxygen tanks are contraindicated in MR magnets with field strength of: - Correct Answer-Any Strength An explosive boiling off of liquid helium and/or liquid nitrogen and a sudden loss of superconductivity is known as a: - Correct Answer-Quench Once a patient has been screened, positioned, and the Mri study is underway, the Mri technologist should: - Correct Answer-Visualize/observe and communicate with the patient through the intercom
Which form of electromagnetic field in MRI can cause cardiac fibrillation? - Correct Answer-GMF Of the following categories of patients, which one would not present any special safety considerations? - Correct Answer-Patients with previous arthroscopic knee surgery The maximum exposure to the extremities from the main magnetic field (Bo) is: - Correct Answer-5T The best way to lessen the effects of acoustic noise during an MRI Study is to: - Correct Answer-Offer the patient disposable ear plugs Guidelines which exclude pregnant individuals from exposure to MRI are mainly to protect the individual from the: - Correct Answer-Radio Frequency (RF) At rest, the approximate basal metabolic rate for humans is: - Correct Answer-1 w/kg Side effects associated with gradient magnetic fields are: - Correct Answer-Bones healing faster, Cardiac fibrillation, Magnetophosphenes Magnetophosphenes are described as: - Correct Answer-Seeing flashes of light Maximum exposure to Radio-Frequency (RF) averaged over the whole body is: - Correct Answer-No more than 0.4 w/kg Maximum exposure to gradient magnetic fields is set at a rate of: - Correct Answer-6T/second Conductive material in the MRI Environment can be affected by electrical currents from: - Correct Answer-GMF and/or RF What government agency sets the SAR for MRI Systems? - Correct Answer-FDA
Ferromagnetic objects such as oxygen tanks, scissors, guns, and some mechanical tools are extremely dangerous and never allowed in the MRI environment because they become a: - Correct Answer- Projectile Of the following, the one that is absolutely contraindicated for an MRI Study is: - Correct Answer-Cardiac pacemaker SAR is the rate that electromagnetic energy is introduced to body tissue, measured in: - Correct Answer- w/kg Acoustic noise is experienced during an MRI Study and is caused by: - Correct Answer-GMF Painful peripheral nerve stimulation can be caused by: - Correct Answer-GMF Currently, there is no evidence of a threat to fetal development from exposure to: - Correct Answer- TRUE Maximum exposure to Radio-Frequency (RF) in one Gram of tissue is: - Correct Answer-A maximum spatial peak of 8 w/kg Patients with cardiac pacemakers are contraindicated for an MRI scan in MR magnets with field strength of: - Correct Answer-Any Strength